Upgrade version to v0.2.1 (#1478)

## Issue Addressed

NA

## Proposed Changes

Updates version strings to `v0.2.1`.

## Additional Info

N/A

common/lighthouse_version/src/lib.rs

@@ -10,7 +10,7 @@ use target_info::Target;
 /// `Lighthouse/v0.2.0-1419501f2+`
 pub const VERSION: &str = git_version!(
     args = ["--always", "--dirty=+"],
-    prefix = "Lighthouse/v0.2.0-",
+    prefix = "Lighthouse/v0.2.1-",
     fallback = "unknown"
 );